Tube-expander.



m r/3,050; PATBNTED 06125, I904. J. J. BYERS.

TUBE EXPANDER.

APPLICATION FILED H13. 5. 1904; no MODEL. v 3 BHEET8BHEE'11.

3 Mud l for attain:

I i 'PATENTED OCT. 25, 1904. JIJ. BYERS. I I

' UNITED STATES Patented October 25, 1904.

P TENT ()FFICE.

JAMEsJ. BYERS, or PENSACOLA, FLORIDA, ASSIGNOR TO EDD H. ROBERTSON," orMOBILE, ALABAMA.

TUBE-EXPANDER.

SPECIFICATION forming part of Letters Fatent No. 773,050, d ed October25, 1904. Application filed I'ebruary'fi 1904'. Serial No. 192,395. (Nomodel.,

To all whom it may concern: I i

Be it known thatl, J AMns J. BYERS, a citizen of the United States,residing at Pensacola, in" the county of Escambia and State of Florida,

have invented new and usefulImprovements in Tube-Expanders, of whichthefollowing is a specification. p I 1 My invention relates to new anduseful improvements in tube-expanders; and its object is to provide asimple, durable, andcompact device of this character which can bereadily inserted and held within a tube and which has means whereby theexpander can be easily rotated during the expanding operation.

A further object is to employ a device for tightening the expanderwithin the tube.

With the above'and other objects in view the invention consists of atapered mandrel a core to which is connected a handle. ratchet isrevolubly. mounted upon the core and is adapted tobe engaged by a pawlco n-' nected to an operating-handle. This ratchet is secured to thehead of the tool, in which are located rollers adapted to bear atopposite sides upon the mandrel and upon the inner.-

surface of the tube to be expanded.

, The invention also consists in the further novel construction andcombination of parts hereinafter more fully described and claimed,

and illustrated in the accompanyingdrawin'gs,

showing the. preferred form of my in vention, and in which I i 1 Figure1 is'a perspective view of the tubeexpander. Fig. 2 is a horizontalsection through the head thereof on line 2 2,. Fig, 3. Fig. 3is acentral vertical section'through the tool. Fig. 4 is a section on lineA4, 'Fig.. 3. Fig. 5 is asectionon line 5 5, Fig.' 3; and Fig. 6 is asection'on line 6 6, Fig. 3. Referring to the figures by numerals ofreference, 1 is a tapered mandrel having a screwthreaded stern2-extending fromthe small end thereof, and this stem extendsthrough andis engaged by a hand-wheel 3, having a circular flange 4 on the innerface thereof and concentric therewith. This flange is revolubly mountedupon one end of a tubular core 5,

revolubly mounted on the core 5. .are interposed between'flange 8 andthe en- ,having a groove 6 adjacent one end for the reception of pins7,'which extend through theflange 4:. An angular flange 8 is formed atthe inner end of core 5 and is seated within the enlarged end 9 of asleeve 10, which is Balls 11 larged portion 9 of sleeve 10 and form anend bearing for the tool. A ring 12, having ratchet-teeth 13 thereon, issecured, by means of screws 14 or in any other suitable manner, tosleeve 10, and the head 15 of the lever 16 is I loosely mounted onsleeve 10 and at opposite sides of the ring 12. A pawl 17. is pivotedwithin the head of the lever 16 and is held, by means of a spring 18,normally in engagement'with the teeth 13 on ring 12. A collar 19incloses and is secured to "the core (rat a point between sleeve 10 andflange 4:, and a handle 20 extends from thiscollar. A cylindrical head21 is located upon the flanged end of core 5 and has an enlargedrecessed end 22,

which receives said flanged. portion of the core and also the enlargedend 9 of sleeve 10. Screws 23 or other suitable fastening means areemployed for securing the head to sleeve 10. A groove 24 is formedwithin the head near its inner end and receives pins 25, which projectthrough a centering-ring 26, loosely mounted on the head and having ears27 extending at right angles therefrom at desired intervals, said earsbeing parallel with the side faces of the head 21. Slots 28 are formedlongitudinally within the sides of the head,

and in each slot is loosely mounted a roller 29,

'so-shaped that when the inner face of said roller isbearing upon amandrel the outer face will be in a plane parallel with the side of thehead.

- In using the tool herein described the wheel 3- is turned so as toforce the tapered portion of mandrel 1 out of the head 21,- and therebypermit the rollers 29 to move into the head. Said head isthen insertedin the end of'the tube to be expanded, so --as to bring said end intocontact with ring 26 and between the ears 27 Handle 20 is graspedin onehand and hand-wheel 3 is turned by the other until the mandrel 1 iscaused to. wedge tightly between rollers 29. Lever 16 is thenreciproeated backward and forward upon sleeve 10, and each forwardmovement of said lever will cause the pawl 17 to engage one of the teeth13 and partly rotate ring 12 and the sleeve and head 21 connectedthereto. Thismovement is continued until the rollers 29 move freelywithin the tube, when said rollers are pressed farther outward by againrotating Wheel 3 on stem 2 and drawing the mandrell farther into head21. The operation above described is then repeated until the desiredexpansion has been produced. after which the tool can he quickly removedby rotating the wheel 3 in the opposite direction, so as to loosen themandrel and remove the pressure upon the rollers 29. The balls 11,interposed between flange 8 and sleeve 21, form a practicallyfrictionless end bearing for the head 21.

It will be seen that the tool when constructed as shown and describedcan be readily assembled or taken apart and forms a durable and compactdevice.

In the foregoing description I have shown the preferred form of myinvention; but I do not limit myself thereto, as I. am aware thatmodifications may be made therein without departing from the spirit orsacrificing any of the advantages thereof, and I therefore reserve theright to make such changes as fairly fall within the scope of myinvention.

Having thus described the invention, what is claimed as new is i 1. In atool of the character described, the combination with a tapered mandrelhaving a threaded stem projecting therefrom; of a core loosely mountedupon the mandrel, a handwheel loosely mounted upon and engaging the coreand stem, a ratchet inclosing and revoluble upon the core, a headmovable with the ratchet, means for rotating the head and ratchet,rollers loosely mounted in the head and bearing on the mandrel, and acenteringring loosely mounted upon the head.

2. In a tool of the character described, the combination with a taperedmandrel having a threaded stem projecting therefrom; of a core looselymounted upon the mandrel, a head loosely mounted upon the core at oneend, a hand-wheel loosely mounted upon the other end of the core andengaging the stem, rollers loosely mounted within the head and normallybearing upon the mandrel, a ring inclosing and loosely mounted on thehead, lugs projecting from the ring, and means for rotating the headupon the core and mandrel.

3. In a tool of the character described, the combination with a taperedmandrel having a threaded stem projecting therefrom; of a core looselymounted upon the mandrel, a handle extending therefrom, amandrel-:nljusting device loosely mounted upon the core and engaging thestem, a head revolubly mounted on the core, rollers loosely mountedwithin the head, a toothed ring connected to and revoluble with thehead, a lever, and a pawl pivoted to the lever and normally engaging thering.

at. In a tool of the character described, the combination with a taperedmandrel having a threaded stem; of a core mounted upon the mandrel, ahandle secured thereto and extending therefrom, a mandrelauljustingdevice ongaging the stem and connected to the core, a handle secured toand extending from the core, a sleeve loosely mounted upon the core, atoothed ring secured thereto, a lever revolubly mounted on the sleeve, apawl connected to the lever and normallyengaging the ring, a headsecured to the sleeve and revoluble therewith, and rollers looselymounted within the head and normally bearing upon the mandrel.

5. In a tool of the character described, the combination with a taperedmandrel having a threaded stem; of a core inelosing the mandrel, amandrel-adjusting device engaging the stem and revolubly mounted uponthe core, a handle secured to and extending from the core, a sleeverevolubly mounted on the core, halls interposed between the sleeve andcore to form an end bearing, a toothed ring secured to the sleeve, alever revolubly mounted upon the sleeve, a pawl pivoted to the lever andnormally engaging the ring, a head secured to the sleeve, rollersloosely mounted therein and normally bearing upon the mandrel, a ringrevolubly mounted on the head, and pins extending therefrom.

In testimony \vhereofl ailix my signaturcin presence of two witnesses.

JAMES J. BYERS.

\Vitnesses:

HAnoLn LOVENDA nL, Sco'r'r M. LOFTIN.

